645
FZUS52 KCHS 221745
CWFCHS

Coastal Waters Forecast
National Weather Service Charleston SC
144 PM EDT Fri Aug 22 2025

South Santee River SC to Savannah GA out 20 NM and Savannah GA to
Altamaha Sound GA out 60 NM, including Charleston Harbor and
Grays Reef National Marine Sanctuary

AMZ300-230600-
144 PM EDT Fri Aug 22 2025

.Synopsis for the coastal waters of south coastal South Carolina
and north coastal Georgia...
A front will remain stalled over the region through Sunday as
waves of low pressure pass by. A much stronger cold front will
clear the area Monday with high pressure prevailing through the
middle of next week.

$$

AMZ330-230600-
Charleston Harbor-
144 PM EDT Fri Aug 22 2025

.THIS AFTERNOON...E winds 10 kt. Showers and tstms.
.TONIGHT...E winds 5 to 10 kt. Showers and tstms.
.SAT...E winds 10 to 15 kt. Showers, tstms.
.SAT NIGHT...NE winds 5 to 10 kt. Showers likely. Tstms likely,
mainly in the evening.
.SUN...N winds 5 to 10 kt. Showers likely with a chance of tstms.
.SUN NIGHT...W winds 5 kt. Showers likely with a chance of tstms
in the evening, then a slight chance of showers and tstms after
midnight.
.MON...W winds 5 to 10 kt. A chance of showers and tstms.
.MON NIGHT...SW winds 5 to 10 kt. A slight chance of showers and
tstms.
.TUE...NE winds 5 to 10 kt. A slight chance of showers and tstms.
.TUE NIGHT...NE winds 5 to 10 kt. A slight chance of showers and
tstms.

Winds and waves higher in and near tstms.

Unless otherwise noted, waves 1 foot or less.

Charleston Harbor water temperature 85 degrees.

$$

AMZ350-230600-
Waters from South Santee River to Edisto Beach SC out 20 NM-
144 PM EDT Fri Aug 22 2025

.THIS AFTERNOON...E winds 10 to 15 kt. Seas 3 to 4 ft. Wave
Detail: E 3 ft at 11 seconds. Showers and tstms.
.TONIGHT...E winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E
3 ft at 4 seconds and E 3 ft at 12 seconds. Showers and tstms.
.SAT...E winds 10 to 15 kt. Seas 3 to 4 ft. Wave Detail: E 3 ft
at 5 seconds and E 2 ft at 12 seconds. Showers with tstms likely.
Vsby 1 to 3 NM in the afternoon.
.SAT NIGHT...E winds 10 to 15 kt, diminishing to 5 to 10 kt after
midnight. Seas 3 to 4 ft. Wave Detail: E 3 ft at 6 seconds and E
2 ft at 12 seconds. Showers with tstms likely in the evening,
then showers with a chance of tstms after midnight with vsby 1 to
3 NM.
.SUN...N winds 5 to 10 kt, becoming NW in the afternoon. Seas
2 to 3 ft. Wave Detail: E 2 ft at 5 seconds and E 2 ft at
12 seconds. A chance of tstms. Showers.
.SUN NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 13 seconds and E 2 ft at 5 seconds. A chance of showers.
A chance of tstms, mainly in the evening.
.MON...W winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of
showers and tstms.
.TUE...NE winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of
showers and tstms.
.TUE NIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of
showers with a slight chance of tstms.

Winds and seas higher in and near tstms.

$$

AMZ352-230600-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
144 PM EDT Fri Aug 22 2025

.THIS AFTERNOON...E winds 5 to 10 kt. Seas 3 ft. Wave Detail: E
3 ft at 11 seconds. Showers and tstms.
.TONIGHT...E winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 11 seconds. Showers and tstms.
.SAT...E winds 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft at
12 seconds and SE 1 foot at 8 seconds. Showers with tstms likely.
.SAT NIGHT...NE winds 5 to 10 kt. Seas 3 ft. Wave Detail: E 3 ft
at 6 seconds and E 2 ft at 12 seconds. Showers. Tstms likely,
mainly in the evening.
.SUN...N winds 5 to 10 kt, becoming NW in the afternoon. Seas
2 to 3 ft. Wave Detail: E 2 ft at 5 seconds and E 2 ft at
12 seconds. Showers likely with a chance of tstms.
.SUN NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: SE
2 ft at 5 seconds and E 2 ft at 13 seconds. Showers likely with a
chance of tstms in the evening, then a chance of showers with a
slight chance of tstms after midnight.
.MON...W winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.MON NIGHT...SW winds 5 to 10 kt. Seas 2 ft. A slight chance of
showers and tstms.
.TUE...NE winds 5 to 10 kt. Seas 2 ft. A slight chance of showers
and tstms.
.TUE NIGHT...NE winds 5 to 10 kt. Seas 2 ft. A slight chance of
showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ354-230600-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
144 PM EDT Fri Aug 22 2025

.THIS AFTERNOON...E winds 5 to 10 kt. Seas 3 to 4 ft. Wave
Detail: E 4 ft at 12 seconds. Showers and tstms.
.TONIGHT...E winds 5 to 10 kt. Seas 3 to 4 ft, subsiding to 2 to
3 ft after midnight. Wave Detail: E 3 ft at 11 seconds, becoming
E 3 ft at 12 seconds and SE 1 foot at 8 seconds. Showers and
tstms.
.SAT...NE winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E 3 ft
at 12 seconds and SE 1 foot at 8 seconds. Showers with a chance
of tstms in the morning, then showers and tstms likely in the
afternoon.
.SAT NIGHT...E winds 5 to 10 kt, becoming NW after midnight. Seas
3 ft. Wave Detail: E 3 ft at 12 seconds and SE 1 foot at
7 seconds. Showers with tstms likely in the evening, then showers
likely with a chance of tstms after midnight with vsby 1 to 3 NM.
.SUN...NW winds 5 to 10 kt. Seas 3 ft. Wave Detail: E 3 ft at
12 seconds. Showers likely with a chance of tstms.
.SUN NIGHT...W winds 5 to 10 kt. Seas 2 to 3 ft. Wave Detail: E
3 ft at 13 seconds and S 1 foot at 4 seconds. Showers likely with
a chance of tstms in the evening, then a chance of showers with a
slight chance of tstms after midnight.
.MON...W winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers
and tstms.
.MON NIGHT...SW winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance
of showers and tstms.
.TUE...N winds 5 to 10 kt. Seas 2 to 3 ft. A slight chance of
showers and tstms.
.TUE NIGHT...NE winds 5 to 10 kt. Seas 2 ft. A slight chance of
showers and tstms.

Winds and seas higher in and near tstms.

$$

AMZ374-230600-
Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM-
144 PM EDT Fri Aug 22 2025

.THIS AFTERNOON...E winds 5 to 10 kt. Seas 4 to 5 ft. Wave
Detail: E 5 ft at 11 seconds and SE 1 foot at 8 seconds. Showers
and tstms.
.TONIGHT...E winds 5 to 10 kt. Seas 4 to 5 ft, subsiding to 3 to
4 ft after midnight. Wave Detail: E 4 ft at 11 seconds and SE
1 foot at 8 seconds, becoming E 4 ft at 12 seconds and SE 1 foot
at 8 seconds. Showers and tstms.
.SAT...E winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E 4 ft at
12 seconds and SE 1 foot at 8 seconds. Showers with tstms likely
in the morning, then showers likely with a chance of tstms in the
afternoon with vsby 1 to 3 NM.
.SAT NIGHT...E winds 5 to 10 kt, becoming SW after midnight. Seas
4 to 5 ft. Wave Detail: E 4 ft at 12 seconds and SE 1 foot at
7 seconds. Showers with a chance of tstms. Vsby 1 to 3 NM after
midnight.
.SUN...NW winds 5 to 10 kt. Seas 4 to 5 ft. Wave Detail: E 4 ft
at 12 seconds and SE 1 foot at 8 seconds. Showers with a chance
of tstms. Vsby 1 to 3 NM in the morning.
.SUN NIGHT...W winds 5 to 10 kt. Seas 3 to 4 ft. Wave Detail: E
4 ft at 13 seconds and S 1 foot at 4 seconds. Showers likely with
a chance of tstms.
.MON...W winds 5 to 10 kt. Seas 3 to 4 ft. A chance of showers
with a slight chance of tstms.
.MON NIGHT...SW winds 5 to 10 kt. Seas 3 to 4 ft. A chance of
showers and tstms.
.TUE...N winds 5 to 10 kt. Seas 3 ft. A slight chance of showers
and tstms.
.TUE NIGHT...NE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of
showers with a slight chance of tstms.

Winds and seas higher in and near tstms.

$$